When I read some of the literature, the U.S. has decided not to go. They're very concerned about losing the front-end control on the cash basis, on the appropriation basis. That's my sense of why they decided not to go that way; they don't feel there's a big enough advantage. A lot of the Commonwealth jurisdictions are going that way, but a number have decided not to.
On October 26th, 2006. See this statement in context.